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Microsoft MB-820 Bundle

Exam Code: MB-820

Exam Name Microsoft Dynamics 365 Business Central Developer

Certification Provider: Microsoft

Corresponding Certification: Microsoft Certified: Dynamics 365 Business Central Developer Associate

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Microsoft Dynamics 365 Business Central Developer (MB-820) Practice Tests

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Microsoft MB-820 Practice Test 48

Question 470

At fictional Xenon Office Supply, the Business Central development team is supporting office stock replenishment and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-115). The observed development issue is that a query has an aggregation column but the grouping fields create one group per unique transaction. Which AL development or design response most directly addresses this issue?

  1. Use a query object with an appropriate aggregation method and grouping columns.
  2. Review grouping columns and Sum/Count aggregation placement.
  3. Reevaluate grouping and totals when adding the dimension to the query projection.
  4. Apply a correct filter in the query or at the query execution boundary.

Explanation

Correct Answer

B:

The most direct corrective response is to review grouping columns and Sum/Count aggregation placement. This addresses the specific failure where a query has an aggregation column but the grouping fields create one group per unique transaction. Acceptance evidence is that the query returns one summarized row per desired customer period.

Incorrect Answers

A:

“Use a query object with an appropriate aggregation method and grouping columns” supports the separate task “use a query object with an appropriate aggregation method and grouping columns”, not the reported problem: a query has an aggregation column but the grouping fields create one group per unique transaction. This case instead calls for “review grouping columns and Sum/Count aggregation placement”.

C:

“Reevaluate grouping and totals when adding the dimension to the query projection” concerns the alternative task “reevaluate grouping and totals when adding the dimension to the query projection”, but the stated failure is that a query has an aggregation column but the grouping fields create one group per unique transaction. The required measure is to review grouping columns and Sum/Count aggregation placement.

D:

The proposed “Apply a correct filter in the query or at the query execution boundary” tests a different control: apply a correct filter in the query or at the query execution boundary. The reported condition is that a query has an aggregation column but the grouping fields create one group per unique transaction; the more direct action is to review grouping columns and Sum/Count aggregation placement.

Question 471

At fictional Xenon Office Supply, the Business Central development team is supporting office stock replenishment and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-115). The observed development issue is that a query has an aggregation column but the grouping fields create one group per unique transaction. Which recurring engineering check would best prevent this issue from returning?

  1. Perform contract tests against query endpoints.
  2. Test matched and unmatched dataitem cases.
  3. Compare totals after changes to report data source.
  4. Test grouping with multiple transactions per customer.

Explanation

Correct Answer

D:

The ongoing check is to test grouping with multiple transactions per customer. This helps detect recurrence when a query has an aggregation column but the grouping fields create one group per unique transaction. The associated correction is to review grouping columns and Sum/Count aggregation placement; a confirming result is that the query returns one summarized row per desired customer period.

Incorrect Answers

A:

“Perform contract tests against query endpoints” concerns the separate step “document the query's read-only contract and choose an API page for supported mutations”. The reported issue is that a query has an aggregation column but the grouping fields create one group per unique transaction, so the direct response is to test grouping with multiple transactions per customer.

B:

“Test matched and unmatched dataitem cases” concerns the alternative task “select a supported outer-join or alternative query design that preserves missing related records”, but the stated failure is that a query has an aggregation column but the grouping fields create one group per unique transaction. The required measure is to test grouping with multiple transactions per customer.

C:

The proposed “Compare totals after changes to report data source” tests a different control: reuse a suitable query data source or aggregate dataset design for report data. The reported condition is that a query has an aggregation column but the grouping fields create one group per unique transaction; the more direct action is to test grouping with multiple transactions per customer.

Question 472

At fictional Xenon Office Supply, the Business Central development team is supporting office stock replenishment and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-115). The observed development issue is that a query has an aggregation column but the grouping fields create one group per unique transaction. Which observed result would most clearly show the intended correction works?

  1. The consumer receives only necessary joined attributes.
  2. Results match ledger totals while avoiding unnecessary per-row processing.
  3. The query returns one summarized row per desired customer period.
  4. Results retain customers without invoices with appropriately empty joined values.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: the query returns one summarized row per desired customer period. The related solution is to review grouping columns and Sum/Count aggregation placement; it is based on the principle that aggregation granularity follows nonaggregated grouping columns.

Incorrect Answers

A:

“The consumer receives only necessary joined attributes” concerns the alternative task “expose appropriate query columns and links instead of exporting full tables with unused fields”, but the stated failure is that a query has an aggregation column but the grouping fields create one group per unique transaction. The required measure is to the query returns one summarized row per desired customer period.

B:

The proposed “Results match ledger totals while avoiding unnecessary per-row processing” tests a different control: use a query object with an appropriate aggregation method and grouping columns. The reported condition is that a query has an aggregation column but the grouping fields create one group per unique transaction; the more direct action is to the query returns one summarized row per desired customer period.

D:

“Results retain customers without invoices with appropriately empty joined values” concerns the separate step “select a supported outer-join or alternative query design that preserves missing related records”. The reported issue is that a query has an aggregation column but the grouping fields create one group per unique transaction, so the direct response is to the query returns one summarized row per desired customer period.

Question 473

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing external-service integration during an extension maintenance sprint (MB820-6.1-181). The observed development issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. Which recurring engineering check would best prevent this issue from returning?

  1. Track retry amplification per endpoint.
  2. Verify headers with a controlled mock endpoint.
  3. Run JSON contract tests against staging service examples.
  4. Scan extension packages and telemetry for credential material.

Explanation

Correct Answer

B:

The ongoing check is to verify headers with a controlled mock endpoint. This helps detect recurrence when a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. The associated correction is to configure the required request headers and validated HTTP method before calling; a confirming result is that the partner receives the expected header only in the outbound request.

Incorrect Answers

A:

The proposed “Track retry amplification per endpoint” tests a different control: implement bounded retries honoring appropriate rate-limit signals and business operation idempotency. The reported condition is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers; the more direct action is to verify headers with a controlled mock endpoint.

C:

“Run JSON contract tests against staging service examples” concerns the separate step “build a JsonObject/JsonToken payload and set the appropriate content headers”. The reported issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers, so the direct response is to verify headers with a controlled mock endpoint.

D:

“Scan extension packages and telemetry for credential material” concerns the alternative task “use supported secret storage or secure authorization flow rather than embedding the token in source”, but the stated failure is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. The required measure is to verify headers with a controlled mock endpoint.

Question 474

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing external-service integration during an extension maintenance sprint (MB820-6.1-181). The observed development issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. Which observed result would most clearly show the intended correction works?

  1. The partner receives the expected header only in the outbound request.
  2. A simulated timeout returns control without committing an unsupported external result.
  3. The integration authenticates while the package and logs contain no secret.
  4. The quote is retrieved through the service contract without direct database access.

Explanation

Correct Answer

A:

This is the outcome that directly verifies the intended correction: the partner receives the expected header only in the outbound request. The related solution is to configure the required request headers and validated HTTP method before calling; it is based on the principle that hTTP request and response metadata serve distinct protocol roles.

Incorrect Answers

B:

“A simulated timeout returns control without committing an unsupported external result” concerns the separate step “set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed”. The reported issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers, so the direct response is to the partner receives the expected header only in the outbound request.

C:

“The integration authenticates while the package and logs contain no secret” concerns the alternative task “use supported secret storage or secure authorization flow rather than embedding the token in source”, but the stated failure is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. The required measure is to the partner receives the expected header only in the outbound request.

D:

The proposed “The quote is retrieved through the service contract without direct database access” tests a different control: use AL HttpClient/HttpRequestMessage to invoke the authorized REST endpoint and parse its response. The reported condition is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers; the more direct action is to the partner receives the expected header only in the outbound request.

Question 475

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing external-service integration during an extension maintenance sprint (MB820-6.1-181). The observed development issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. Which AL development or design response most directly addresses this issue?

  1. Configure the required request headers and validated HTTP method before calling.
  2. Inspect JSON token types and iterate JsonArray elements using supported AL JSON APIs.
  3. Set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed.
  4. Use supported secret storage or secure authorization flow rather than embedding the token in source.

Explanation

Correct Answer

A:

The most direct corrective response is to configure the required request headers and validated HTTP method before calling. This addresses the specific failure where a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. Acceptance evidence is that the partner receives the expected header only in the outbound request.

Incorrect Answers

B:

“Inspect JSON token types and iterate JsonArray elements using supported AL JSON APIs” concerns the alternative task “inspect JSON token types and iterate JsonArray elements using supported AL JSON APIs”, but the stated failure is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. The required measure is to configure the required request headers and validated HTTP method before calling.

C:

The proposed “Set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed” tests a different control: set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed. The reported condition is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers; the more direct action is to configure the required request headers and validated HTTP method before calling.

D:

“Use supported secret storage or secure authorization flow rather than embedding the token in source” supports the separate task “use supported secret storage or secure authorization flow rather than embedding the token in source”, not the reported problem: a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. This case instead calls for “configure the required request headers and validated HTTP method before calling”.

Question 476

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing external-service integration during an extension maintenance sprint (MB820-6.1-181). The observed development issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. Which Business Central or AL development principle best explains the right response?

  1. Service integration should use published APIs across trust boundaries.
  2. External service latency must not create unbounded transactional dependency.
  3. HTTP request and response metadata serve distinct protocol roles.
  4. JSON object and array types are distinct structural contracts.

Explanation

Correct Answer

C:

The governing principle is that hTTP request and response metadata serve distinct protocol roles. The engineering response is to configure the required request headers and validated HTTP method before calling. Verification should show that the partner receives the expected header only in the outbound request.

Incorrect Answers

A:

“Service integration should use published APIs across trust boundaries” concerns the alternative task “use AL HttpClient/HttpRequestMessage to invoke the authorized REST endpoint and parse its response”, but the stated failure is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers. The required measure is to configure the required request headers and validated HTTP method before calling.

B:

The proposed “External service latency must not create unbounded transactional dependency” tests a different control: set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed. The reported condition is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers; the more direct action is to configure the required request headers and validated HTTP method before calling.

D:

“JSON object and array types are distinct structural contracts” concerns the separate step “inspect JSON token types and iterate JsonArray elements using supported AL JSON APIs”. The reported issue is that a third-party endpoint requires a custom authorization header but the request object sends it on the response headers, so the direct response is to configure the required request headers and validated HTTP method before calling.

Question 477

At fictional Ironwood Charities, the Business Central development team is supporting grant funding and accounting and reviewing extension environment and deployment preparation during a release qualification test (MB820-2.2-046). The observed development issue is that a developer publishes an .app built for one environment straight to another without testing compatibility. Which recurring engineering check would best prevent this issue from returning?

  1. Run data migration regression tests with representative historical records.
  2. Enforce environment promotion gates in the pipeline.
  3. Run multilingual UI checks after adding new messages.
  4. Gate completion on installed version and smoke-test results.

Explanation

Correct Answer

B:

The ongoing check is to enforce environment promotion gates in the pipeline. This helps detect recurrence when a developer publishes an .app built for one environment straight to another without testing compatibility. The associated correction is to promote a versioned extension artifact through sandbox acceptance before production deployment; a confirming result is that the production package hash matches the artifact that passed tests.

Incorrect Answers

A:

The proposed “Run data migration regression tests with representative historical records” tests a different control: use a versioned upgrade codeunit and preserve/migrate existing records before using the new schema. The reported condition is that a developer publishes an .app built for one environment straight to another without testing compatibility; the more direct action is to enforce environment promotion gates in the pipeline.

C:

“Run multilingual UI checks after adding new messages” concerns the separate step “use AL labels and language translation resources rather than embedding UI messages as literals”. The reported issue is that a developer publishes an .app built for one environment straight to another without testing compatibility, so the direct response is to enforce environment promotion gates in the pipeline.

D:

“Gate completion on installed version and smoke-test results” concerns the alternative task “separate publish, synchronize, install or upgrade and validation stages with explicit failure reporting”, but the stated failure is that a developer publishes an .app built for one environment straight to another without testing compatibility. The required measure is to enforce environment promotion gates in the pipeline.

Question 478

At fictional Ironwood Charities, the Business Central development team is supporting grant funding and accounting and reviewing extension environment and deployment preparation during a release qualification test (MB820-2.2-046). The observed development issue is that a developer publishes an .app built for one environment straight to another without testing compatibility. Which AL development or design response most directly addresses this issue?

  1. Publish and install compatible dependencies before the dependent .app file.
  2. Separate debugger lifecycle from extension publish, install and uninstall procedures.
  3. Separate publish, synchronize, install or upgrade and validation stages with explicit failure reporting.
  4. Promote a versioned extension artifact through sandbox acceptance before production deployment.

Explanation

Correct Answer

D:

The most direct corrective response is to promote a versioned extension artifact through sandbox acceptance before production deployment. This addresses the specific failure where a developer publishes an .app built for one environment straight to another without testing compatibility. Acceptance evidence is that the production package hash matches the artifact that passed tests.

Incorrect Answers

A:

“Publish and install compatible dependencies before the dependent .app file” supports the separate task “publish and install compatible dependencies before the dependent .app file”, not the reported problem: a developer publishes an .app built for one environment straight to another without testing compatibility. This case instead calls for “promote a versioned extension artifact through sandbox acceptance before production deployment”.

B:

“Separate debugger lifecycle from extension publish, install and uninstall procedures” concerns the separate step “separate debugger lifecycle from extension publish, install and uninstall procedures”. The reported issue is that a developer publishes an .app built for one environment straight to another without testing compatibility, so the direct response is to promote a versioned extension artifact through sandbox acceptance before production deployment.

C:

“Separate publish, synchronize, install or upgrade and validation stages with explicit failure reporting” concerns the alternative task “separate publish, synchronize, install or upgrade and validation stages with explicit failure reporting”, but the stated failure is that a developer publishes an .app built for one environment straight to another without testing compatibility. The required measure is to promote a versioned extension artifact through sandbox acceptance before production deployment.

Question 479

At fictional Ironwood Charities, the Business Central development team is supporting grant funding and accounting and reviewing extension environment and deployment preparation during a release qualification test (MB820-2.2-046). The observed development issue is that a developer publishes an .app built for one environment straight to another without testing compatibility. Which Business Central or AL development principle best explains the right response?

  1. Debugging does not constitute an extension rollback mechanism.
  2. Controlled deployment should promote tested artifacts rather than unverified rebuilds.
  3. User-facing text belongs in localizable resources.
  4. Installation lifecycle hooks differ from ordinary page execution and upgrades.

Explanation

Correct Answer

B:

The governing principle is that controlled deployment should promote tested artifacts rather than unverified rebuilds. The engineering response is to promote a versioned extension artifact through sandbox acceptance before production deployment. Verification should show that the production package hash matches the artifact that passed tests.

Incorrect Answers

A:

“Debugging does not constitute an extension rollback mechanism” concerns the separate step “separate debugger lifecycle from extension publish, install and uninstall procedures”. The reported issue is that a developer publishes an .app built for one environment straight to another without testing compatibility, so the direct response is to promote a versioned extension artifact through sandbox acceptance before production deployment.

C:

The proposed “User-facing text belongs in localizable resources” tests a different control: use AL labels and language translation resources rather than embedding UI messages as literals. The reported condition is that a developer publishes an .app built for one environment straight to another without testing compatibility; the more direct action is to promote a versioned extension artifact through sandbox acceptance before production deployment.

D:

“Installation lifecycle hooks differ from ordinary page execution and upgrades” supports the separate task “use an installation codeunit with appropriate company initialization and idempotent setup”, not the reported problem: a developer publishes an .app built for one environment straight to another without testing compatibility. This case instead calls for “promote a versioned extension artifact through sandbox acceptance before production deployment”.

Question 480

At fictional Ironwood Charities, the Business Central development team is supporting grant funding and accounting and reviewing extension environment and deployment preparation during a release qualification test (MB820-2.2-046). The observed development issue is that a developer publishes an .app built for one environment straight to another without testing compatibility. Which observed result would most clearly show the intended correction works?

  1. A locale switch displays reviewed translations without altering business logic.
  2. A seeded tenant retains prior values after the new app version is applied.
  3. The production package hash matches the artifact that passed tests.
  4. Initial deployment creates required setup once without duplicating it on repeated operations.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: the production package hash matches the artifact that passed tests. The related solution is to promote a versioned extension artifact through sandbox acceptance before production deployment; it is based on the principle that controlled deployment should promote tested artifacts rather than unverified rebuilds.

Incorrect Answers

A:

“A locale switch displays reviewed translations without altering business logic” concerns the alternative task “use AL labels and language translation resources rather than embedding UI messages as literals”, but the stated failure is that a developer publishes an .app built for one environment straight to another without testing compatibility. The required measure is to the production package hash matches the artifact that passed tests.

B:

The proposed “A seeded tenant retains prior values after the new app version is applied” tests a different control: use a versioned upgrade codeunit and preserve/migrate existing records before using the new schema. The reported condition is that a developer publishes an .app built for one environment straight to another without testing compatibility; the more direct action is to the production package hash matches the artifact that passed tests.

D:

“Initial deployment creates required setup once without duplicating it on repeated operations” concerns the separate step “use an installation codeunit with appropriate company initialization and idempotent setup”. The reported issue is that a developer publishes an .app built for one environment straight to another without testing compatibility, so the direct response is to the production package hash matches the artifact that passed tests.